Non-infrastructure ultra-wideband wireless positioning method and system using latency communication and overhear

A non-infrastructure ultra-wideband (UWB) wireless positioning method, comprising:

• obtaining a ranging message transmitted from each of active devices by using an overhear function;
• obtaining positioning necessary data for positioning included in the ranging message;
• measuring a location of a passive device by using the positioning necessary data;
• creating a message for changing the passive device to an active device, when a remaining amount of power of each of the active devices included in the ranging message and a remaining amount of power of the passive device are compared and a preset condition is satisfied;
• and
• transmitting the created message to the active devices,
• wherein, when the created message is transmitted to the active devices, one active device of the active devices changes to a passive device, and the passive device changes from a passive device to an active device.

A non-infrastructure ultra-wideband (UWB) wireless positioning system, comprising:

• active devices that measure their locations through latency communication and a ranging process;
• and
• at least one passive device that obtains a ranging message transmitted from each of the active devices by overhearing and measures its own location based on positioning necessary data for positioning included in the ranging message,
• wherein the passive device compares a remaining amount of power of each of the active devices included in the ranging message and its remaining amount of power of the passive device and, when a preset condition is satisfied, creates a message for changing to an active device and transmits the message to the active devices, so that one active device of the active devices changes to a passive device, and the passive device changes from a passive device to an active device.